Charging device



.Lismam C. C. HANSEN CHARGING DEVICE Filed March 1, 1930 Jan. 20, 1931.

. 2U. i q m IN V EN T 0R. ilzaz a t- Hansen.

H15 .4 TTORNEY.

Patented Jan. 20, 1931 i CHARLES C. HANSEN,

COMPANY, OF JERSE TTS OF EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RAND Y CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY CHARGING DEVICE Application filed March 1,

This invention relates to charging devices,

but more particularly adapted for depositing a submerged drill. hole.

to a charging device explosive material in One of the objects of the invention is to enable the explosive iently deposited and compressed tom of a submerged d ob ect 15 to permit merit between various material to be convenin the botrill hole and another of relative pivotal moveelements comprising the charging device in order to prevent binding or" the device in a drill ,hole, as for instance, a drill hole in which a portion or pertions incline from the t rue course.

In the accompanyin drawings illustrating the invention and in which similar reference ChAl'EIClYQ/IS refer to device constructed in practice of the invention and similar parts,

Figure 1 is an elevation of the charging accordance with the showing the manner in which it may be lowered into the drill hole,

Figure 2 is a sectional elevation of the charging device, and

Figure 3 is a sectional elevation of the charging device illustrating the manner in which the container or tube for explosive material may adjust its position with respect to the handle extension.

Referring to the drawings, and at first more particularly to Figure 1, the charging device which. is designated generally by A is shown suspended from a derrick B mounted upon a scow or drill barge C supported by the water I).

The barge C may be able manner, and susp guide frame E anchored in any suitended therefrom 1s a consisting of a pair of parallel tion H wherein a hole J has been drilled.

The lower ends or the members. F are in this instance held in sp spect to each other by a aced relation with recross head K to which is attached a sand pipe L. The sand pipe L is shown extending through the silt G and seats with its lower en (1 against the rock H 1930. Serial No. 432,389.

to prevent the entrance of silt and dbris into the drill hole during the drilling opera tion.

V The loading device constructed in accordance with the ractice of the invention comprises a tube the interior of which forms a chamber P for explosive material Q. At the rear end of the tube 0 is a head R which may be secured to the tube in any suitable manner and said head R has a socket S preferably of partly spherical form for the reception of a ball T carried by the end of a handle extension U whereby the loading device A may be manipulated.

In order to eject the explosive material from the chamber P the said chamber is provided with a plunger V having in this instance a flexible rod W .which extends through a bore X in the handle extension U.

The rod TV carries on its upper orfree endJa be of any suitable length, depending upon the depth of the water overlying the rock H, and in this instance the bore X serves as a passage through which fluid under pressure, as for instance, water or air, may be conveyed to the chamber P for actuating the plunger V. Such ably admitted into the upper end of the e tension U through a connection I) which may lead from a suitable source of supply and having a controlling means. such as a valve 0, interposed therein for controlling the admission of fluid into the bore X and thus also into the chamber P.

To the end that the plunger V may be prcrented from being completely forced out of 5 pressure fluid is prefer from a source of electrical energy, such as a the chamber while the tube is still a considersecuring thewire to the foremost explosive material in the chamber P.

battery (not shown), to a detonator g in the explosive material Q. The wire f may serve as a means for maintaining the sive material Within the chamber P. By 7 section of the explosivematerial and thereafter maintaining the said wire reasonably taut the ex; plosive naterial will be securely held in the chamber P during the operation of entering the tube into the drill. hole.

Additional means, however, such as a wedge it, maybe provided for retaining the The wedge h may be inserted in the front end of the tube {)5 to press the foremost section of the explosive material lightly against the Wall of the chamber P, and upon the expulsion of the explosive material the wedge will also be expelled from the. tube along with the.

explosive' .Aswill be reauily understood from theforegoing description, the tube O, together with the head R, are capable of universal movement with respect to the extension U. This is a'desirable feature in devices of this character since it enables the tube which is of larger diameter than the extension to readily adjust its position in an inclined drill hole.

In known devices of this character in which the tube and the handleextension are rigidly connected to each other considerable trouble is often encountered in depositing the explosive charge in the bottom of a drill hole where, owing to irregularities in the rock, the

drill steel which, during the course of the drilling operation, deflects from the desired course so that the hole becomes inclined with respect to the drilling apparatus. The principal difficulty in charging such holes is that the tube, which of necessity only of slightly smaller diameter than the drill hole, binds on the sides thereof as does also the'handle ex, tension. it therefore frequently becomes necessary to eject the explosive material from able distance from the bottom of the hole. GbYlOtlSly, when. thus ejected it is not possible to compress the charge in the bottom of the drill hole) Although flexibility is an extren'iely desirable feature in charg rs of this type, it s however essential that the tube be maintained in substantially coaxial alignment with the handle extension U during the time the devise A is being lowered into the drill hole a d until at least the end of the-tube 0 has been cut into the drill hole.

in order assure t er to nose relative positions of the tube 0 and the exiension, the plunger V is providei'l with a stem j which extends rearwarly of the plunger and may be attached to the rod o The stem-j is of such length that when the plunger V is fully re.-

explo- I the 'ch argin the drill hole;

.tracted in the chamber P, said stem will extational. The handle extension and the tube will then be held in coaxial alignment andg device Will, in effect, be rigid so that. the tube 0 may be readily inserted into the sand pipeL and thus into the drill hole J After the tube 0 has entered the drill hole, the collar clamp d may be moved along the rod W to a distance from the end of the handle extension'Uslightly in excess of'the length of the stem This Will permit the stem 7' to be removed from the bore X. The tube will then be free to follow the course of least resistance through the drill hole.

The pressure required for moving the stem out of the bore X may be applied either m.an-. ually by pressing on'the rodlV or pressure fluid "may be. admitted from the conduit 1) into the bore hen pressure fluid used for this purpose such pressure fluid will act against the stem j and'against the rear end of the plunger V and will move the plunger. and stem downwardly until the collar clamp. d again of the handleextensioil U. then be readily lowered until tube O seats against the bottom of the drill hole J. f r I lVhen the tube() reaches'this position the collar clamp (Z may be released. Fluid under full-line pressure may then be ad-. mitted into I the chamber P to move thev plunger V downwardly for-expelling the explosive chargefrom thechamberP and to compress it in the bottom of the drillv hole J. After the explosive material has been ex-'- polled from the chamber P, the entire device seats against the end 7 The device may the end of the ma; again be lifted from the drill hole by 7 means of the'oable Z. r

The stem j may, if desired, consist of two. portions 73 and -0 of different diameters.

VJ hen so constructed the portion 7a may be of larger diameter than the portion'o, which. fits into. the bore X and the head It may-be pi'tovided with a suitable bore 79 to accommodate the portion is of the stem Preferably the" portions Z; and 0 are provided with: tapered sea-ting surfaces 9 and 7 respectively to enable said portions to readily enter their. respective bores: v

The. plunger V may serve both as a means for (limiting the explosive material Q from the chamber P and also as a means for tampin the explosive material in the bottom of lVhen serving in the latter capacity the plunger V-inay be held in the". extended. position, that. is, in the positionil lustrated in Figure 2 iii-Which the end of the plunger protrudes from the tube Q. The plunger. V may be readily held'in this position by the prssurefluid used for moving it downwardly and it-smovement in this direction will of course be limited by the link Y which, when the plunger V lies in the foremost position in the tube, will seat against the collar clamp d.

When using the device as a tamper the entire device is of course reciprocated bodily in the drill hole by the operator who may grasp the handle extension for this purpose. In moving the tube back and forth in the drill hole for the purpose of compressing the explosive material therein it is quite possible, and in fact it frequently happens that detritus lodged on the wall of the drill hole may become loosened by the tube 0.

Unless removed such detritus will accumulate in the space between the tube 0 and the wall of the drill hole J and will exert a binding action on the tube which will greatly interfere with the free movement of the tube. Moreover, in locations where the sand pipe L seats on an inclined rock surface it is also possible for silt to drop into the drill hole and accumulate therein to an extent which will interfere seriously with the tamping movement of the device.

As may be readily understood, it is therefore desirable that the drill hole be thoroughly flushed to remove dirt and cuttings there from. To this end the tube 0 is provided with a series of ports 8 which maybe arranged in the same transverse plane and are preferably so located in the tube that when the plunger V is fully extended, that is, when it lies in its foremost position, said ports 8 will be uncovered by the plunger V. In this way, when the plunger V is forced forwardly to eject the explosive material from the chamber P the ports 8 will be uncovered so that pressure fluid may escape from the chamber l? into the drill hole. Any loose material, such as silt or cuttings, which may tend to precipitate in the drill hole will then be flushed through the sand pipe L, thus assuring free movement of the device for tamping the explosive material in the drill hole.

By locating the ports 8 in the manner described the movement of the plunger V within the chamber P during the tamping operation will be to some extent cushioned, since, when the device is dropped on the charge to compress it, the plunger V is capable. of some sligl t degree of movement in the direction of the ports 8 which it may overrun upon each thrust of the plunger V against the explosive charge,

I claim:

l. A charging device comprising a tube adapted to be inserted into a drill hole and having a chamber for explosive material, a plunger for ejecting the explosive material from the chamber, a handle extension for the tube and being pivotally connected thereto, and means for holding the tube and the handle extension against relative pivotal movement.

2. Av charging device coi'nprisiug a lube adapted to be inserted into a drill hole and laving a chamber for explosive material, a plunger for ejecting the explosive material from the chamber, a handle extension for the tube and being pivotally connected thereto, and locking means for maintaining the tube in axial alignment with the handle extension.

3. A charging device comprising a tube adapted to be inserted into a drill hole and having a chamber for explosive material, a plunger for ejecting the explosive material from the chamber, a handle extension for the tube and being pivot-ally connecter thereto, and locking means associated with the plunger for holding the handle extension and the tube against relative pivotal movement.

l. A. charging device comprising a tube adapted to be inserted into a drill hole and having a chamber for explosive material, a plunger for ejecting the explosive material from the chamber, a handle extension having a bore and being pivotally connected to the tube, and a stem on the plunger and movable into the bore to hold the tube and the handle extension against relative pivotal movement. 5; A charging device comprising a tube adapted to be inserted into a drill hole and having a chamber for explosive material, a plunger for ejecting the explosive material from the chamber, a handle extension for the tubeand having a universal connection with said tube, said handle extension having abore, a stem on the plunger to engage the bore for holding the tube in axial alignment with the handle extension, and means for moving the stem out of the bore to permit of universal movement of the tube with respect to the handle extension.

6. A charging device comprising a tube adapted to be inserted into a drill hole and having a chamber for explosive material, a plunger for ejecting the explosive material from the chamber, a handle extension having a universal connection with the tube, said handle extension having a bore therein, a stem associated with the plunger and adapted to extend into the bore to hold the tube axially aligned with respect to the handle extension, and means for introducing pressure fluid into the bore to act against the stem and the plunger for moving said stem out of the bore, thereby permitting the tube to assume an inclined position with respect to the handle extension.

7. A charging device comprising a. tube adapted to be inserted into a drill hole and having a chamber for explosive material, a plunger for evacuating the explosive material from the chamber, a handle extension having a universal connection with the tube, said handle extension having a bore therein, a stem associated with the plunger and adapted to be extended into the bore to hold the tube axially aligned with respect to the handle extension, a flexible rod extending through the bore and connectedto the stem for movingthestem into the bore,,and a con nection leedingjfrom a source of pressure fluid supply andconnected to the handle ex- "tensionfer introducing pressure fluid-into the bore to act against the stem and the plunger for removing the plunger from the bore to permit the tube to assume an inclined 10 position with respect to the-handle extension and alsofor evacuating the explosive material from the tube into the drill hole.

8. A charging device comprising a tube adapted to be inserted into a drill hole-and having a chamberi'or explosive material, a pressure actuated plunger in the chamber for ejecting the explosive material from the chamber, and a port in the tube adapted to be uncovered by the plunger to permit theescape of aressure fluid fron the chamber for flushing the drill hole.

9. A charging device comprising a ,tube adapted to be inserted into a drill hole and having a chamber for explosive meterial, a

' pressure fluid actuated plunger in the cha n,- ber for ejecting the explosive material from the chamber and for compressing the explosive material in the drill hole, a handle extension pivotally connected to the tube and havse ing a bore for conveying pressure fluid into the chamber, and ports in the tube near the front end th reof and adapted to be uncovered by the plunger to permit the escape of pressure fluid from the chamber for flushing the drill hole 7 In testimony whereof I have signed this specification.

CHARLES C. HANSEN, 

